define(function(require, exports, module) {
//改造扩展
var jQuery = require("jQuery");
require('../datatables/datatables');
//源码地址
//http://cdn.datatables.net/fixedheader/2.1.2/js/dataTables.fixedHeader.js


/*! FixedHeader 2.1.2
 * ©2010-2014 SpryMedia Ltd - datatables.net/license
 */

/**
 * @summary     FixedHeader
 * @description Fix a table's header or footer, so it is always visible while
 *              Scrolling
 * @version     2.1.2
 * @file        dataTables.fixedHeader.js
 * @author      SpryMedia Ltd (www.sprymedia.co.uk)
 * @contact     www.sprymedia.co.uk/contact
 * @copyright   Copyright 2009-2014 SpryMedia Ltd.
 *
 * This source file is free software, available under the following license:
 *   MIT license - http://datatables.net/license/mit
 *
 * This source file is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE. See the license files for details.
 *
 * For details please refer to: http://www.datatables.net
 */

/* Global scope for FixedColumns for backwards compatibility - will be removed
 * in future. Not documented in 1.1.x.
 */

/* Global scope for FixedColumns */
var FixedHeader;

(function(window, document, undefined) {


var factory = function( $, DataTable ) {
"use strict";

/*
 * Function: FixedHeader
 * Purpose:  Provide 'fixed' header, footer and columns for a DataTable
 * Returns:  object:FixedHeader - must be called with 'new'
 * Inputs:   mixed:mTable - target table
 *  @param {object} dt DataTables instance or HTML table node. With DataTables
 *    1.10 this can also be a jQuery collection (with just a single table in its
 *    result set), a jQuery selector, DataTables API instance or settings
 *    object.
 *  @param {object} [oInit] initialisation settings, with the following
 *    properties (each optional)
 *    * bool:top -    fix the header (default true)
 *    * bool:bottom - fix the footer (default false)
 *    * int:left -    fix the left column(s) (default 0)
 *    * int:right -   fix the right column(s) (default 0)
 *    * int:zTop -    fixed header zIndex
 *    * int:zBottom - fixed footer zIndex
 *    * int:zLeft -   fixed left zIndex
 *    * int:zRight -  fixed right zIndex
 */
FixedHeader = function ( mTable, oInit ) {
    /* Sanity check - you just know it will happen */
    if ( ! this instanceof FixedHeader )
    {
        alert( "FixedHeader warning: FixedHeader must be initialised with the 'new' keyword." );
        return;
    }

    var that = this;
    var oSettings = {
        "aoCache": [],
        "oSides": {
            "top": true,
            "bottom": false,
            "left": 0,
            "right": 0
        },
        "oZIndexes": {
            "top": 104,
            "bottom": 103,
            "left": 102,
            "right": 101
        },
        "oCloneOnDraw": {
            "top": false,
            "bottom": false,
            "left": true,
            "right": true
        },
        "oMes": {
            "iTableWidth": 0,
            "iTableHeight": 0,
            "iTableLeft": 0,
            "iTableRight": 0, /* note this is left+width, not actually "right" */
            "iTableTop": 0,
            "iTableBottom": 0 /* note this is top+height, not actually "bottom" */
        },
        "oOffset": {
            "top": 0
        },
        "nTable": null,
        "bFooter": false,
        "bInitComplete": false
    };

    /*
     * Function: fnGetSettings
     * Purpose:  Get the settings for this object
     * Returns:  object: - settings object
     * Inputs:   -
     */
    this.fnGetSettings = function () {
        return oSettings;
    };

    /*
     * Function: fnUpdate
     * Purpose:  Update the positioning and copies of the fixed elements
     * Returns:  -
     * Inputs:   -
     */
    this.fnUpdate = function () {
        this._fnUpdateClones();
        this._fnUpdatePositions();
    };

    /*
     * Function: fnPosition
     * Purpose:  Update the positioning of the fixed elements
     * Returns:  -
     * Inputs:   -
     */
    this.fnPosition = function () {
        this._fnUpdatePositions();
    };


    var dt = $.fn.dataTable.Api ?
        new $.fn.dataTable.Api( mTable ).settings()[0] :
        mTable.fnSettings();

    dt._oPluginFixedHeader = this;

    /* Let's do it */
    this.fnInit( dt, oInit );

};


/*
 * Variable: FixedHeader
 * Purpose:  Prototype for FixedHeader
 * Scope:    global
 */
FixedHeader.prototype = {
    /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
     * Initialisation
     */

    /*
     * Function: fnInit
     * Purpose:  The "constructor"
     * Returns:  -
     * Inputs:   {as FixedHeader function}
     */
    fnInit: function ( oDtSettings, oInit )
    {
        var s = this.fnGetSettings();
        var that = this;

        /* Record the user definable settings */
        this.fnInitSettings( s, oInit );

        if ( oDtSettings.oScroll.sX !== "" || oDtSettings.oScroll.sY !== "" )
        {
            alert( "FixedHeader 2 is not supported with DataTables' scrolling mode at this time" );
            return;
        }

        s.nTable = oDtSettings.nTable;
        oDtSettings.aoDrawCallback.unshift( {
            "fn": function () {
                FixedHeader.fnMeasure();
                that._fnUpdateClones.call(that);
                that._fnUpdatePositions.call(that);
            },
            "sName": "FixedHeader"
        } );

        s.bFooter = ($('>tfoot', s.nTable).length > 0) ? true : false;

        /* Add the 'sides' that are fixed */
        if ( s.oSides.top )
        {
            s.aoCache.push( that._fnCloneTable( "fixedHeader", "FixedHeader_Header", that._fnCloneThead ) );
        }
        if ( s.oSides.bottom )
        {
            s.aoCache.push( that._fnCloneTable( "fixedFooter", "FixedHeader_Footer", that._fnCloneTfoot ) );
        }
        if ( s.oSides.left )
        {
            s.aoCache.push( that._fnCloneTable( "fixedLeft", "FixedHeader_Left", that._fnCloneTLeft, s.oSides.left ) );
        }
        if ( s.oSides.right )
        {
            s.aoCache.push( that._fnCloneTable( "fixedRight", "FixedHeader_Right", that._fnCloneTRight, s.oSides.right ) );
        }

        /* Event listeners for window movement */
        FixedHeader.afnScroll.push( function () {
            that._fnUpdatePositions.call(that);
        } );

        $(window).resize( function () {
            FixedHeader.fnMeasure();
            that._fnUpdateClones.call(that);
            that._fnUpdatePositions.call(that);
        } );

        $(s.nTable)
            .on('column-reorder.dt', function () {
                FixedHeader.fnMeasure();
                that._fnUpdateClones( true );
                that._fnUpdatePositions();
            } )
            .on('column-visibility.dt', function () {
                FixedHeader.fnMeasure();
                that._fnUpdateClones( true );
                that._fnUpdatePositions();
            } );

        /* Get things right to start with */
        FixedHeader.fnMeasure();
        that._fnUpdateClones();
        that._fnUpdatePositions();

        s.bInitComplete = true;
    },


    /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
     * Support functions
     */

    /*
     * Function: fnInitSettings
     * Purpose:  Take the user's settings and copy them to our local store
     * Returns:  -
     * Inputs:   object:s - the local settings object
     *           object:oInit - the user's settings object
     */
    fnInitSettings: function ( s, oInit )
    {
        if ( oInit !== undefined )
        {
            if ( oInit.top !== undefined ) {
                s.oSides.top = oInit.top;
            }
            if ( oInit.bottom !== undefined ) {
                s.oSides.bottom = oInit.bottom;
            }
            if ( typeof oInit.left == 'boolean' ) {
                s.oSides.left = oInit.left ? 1 : 0;
            }
            else if ( oInit.left !== undefined ) {
                s.oSides.left = oInit.left;
            }
            if ( typeof oInit.right == 'boolean' ) {
                s.oSides.right = oInit.right ? 1 : 0;
            }
            else if ( oInit.right !== undefined ) {
                s.oSides.right = oInit.right;
            }

            if ( oInit.zTop !== undefined ) {
                s.oZIndexes.top = oInit.zTop;
            }
            if ( oInit.zBottom !== undefined ) {
                s.oZIndexes.bottom = oInit.zBottom;
            }
            if ( oInit.zLeft !== undefined ) {
                s.oZIndexes.left = oInit.zLeft;
            }
            if ( oInit.zRight !== undefined ) {
                s.oZIndexes.right = oInit.zRight;
            }

            if ( oInit.offsetTop !== undefined ) {
                s.oOffset.top = oInit.offsetTop;
            }
            if ( oInit.alwaysCloneTop !== undefined ) {
                s.oCloneOnDraw.top = oInit.alwaysCloneTop;
            }
            if ( oInit.alwaysCloneBottom !== undefined ) {
                s.oCloneOnDraw.bottom = oInit.alwaysCloneBottom;
            }
            if ( oInit.alwaysCloneLeft !== undefined ) {
                s.oCloneOnDraw.left = oInit.alwaysCloneLeft;
            }
            if ( oInit.alwaysCloneRight !== undefined ) {
                s.oCloneOnDraw.right = oInit.alwaysCloneRight;
            }
        }
    },

    /*
     * Function: _fnCloneTable
     * Purpose:  Clone the table node and do basic initialisation
     * Returns:  -
     * Inputs:   -
     */
    _fnCloneTable: function ( sType, sClass, fnClone, iCells )
    {
        var s = this.fnGetSettings();
        var nCTable;

        /* We know that the table _MUST_ has a DIV wrapped around it, because this is simply how
         * DataTables works. Therefore, we can set this to be relatively position (if it is not
         * alreadu absolute, and use this as the base point for the cloned header
         */
        if ( $(s.nTable.parentNode).css('position') != "absolute" )
        {
            s.nTable.parentNode.style.position = "relative";
        }

        /* Just a shallow clone will do - we only want the table node */
        nCTable = s.nTable.cloneNode( false );
        nCTable.removeAttribute( 'id' );

        var nDiv = document.createElement( 'div' );
        nDiv.style.position = "absolute";
        nDiv.style.top = "0px";
        nDiv.style.left = "0px";
        nDiv.className += " FixedHeader_Cloned "+sType+" "+sClass;

        /* Set the zIndexes */
        if ( sType == "fixedHeader" )
        {
            nDiv.style.zIndex = s.oZIndexes.top;
        }
        if ( sType == "fixedFooter" )
        {
            nDiv.style.zIndex = s.oZIndexes.bottom;
        }
        if ( sType == "fixedLeft" )
        {
            nDiv.style.zIndex = s.oZIndexes.left;
        }
        else if ( sType == "fixedRight" )
        {
            nDiv.style.zIndex = s.oZIndexes.right;
        }

        /* remove margins since we are going to position it absolutely */
        nCTable.style.margin = "0";

        /* Insert the newly cloned table into the DOM, on top of the "real" header */
        nDiv.appendChild( nCTable );
        document.body.appendChild( nDiv );

        return {
            "nNode": nCTable,
            "nWrapper": nDiv,
            "sType": sType,
            "sPosition": "",
            "sTop": "",
            "sLeft": "",
            "fnClone": fnClone,
            "iCells": iCells
        };
    },

    /*
     * Function: _fnMeasure
     * Purpose:  Get the current positioning of the table in the DOM
     * Returns:  -
     * Inputs:   -
     */
    _fnMeasure: function ()
    {
        var
            s = this.fnGetSettings(),
            m = s.oMes,
            jqTable = $(s.nTable),
            oOffset = jqTable.offset(),
            iParentScrollTop = this._fnSumScroll( s.nTable.parentNode, 'scrollTop' ),
            iParentScrollLeft = this._fnSumScroll( s.nTable.parentNode, 'scrollLeft' );

        m.iTableWidth = jqTable.outerWidth();
        m.iTableHeight = jqTable.outerHeight();
        m.iTableLeft = oOffset.left + s.nTable.parentNode.scrollLeft;
        m.iTableTop = oOffset.top + iParentScrollTop;
        m.iTableRight = m.iTableLeft + m.iTableWidth;
        m.iTableRight = FixedHeader.oDoc.iWidth - m.iTableLeft - m.iTableWidth;
        m.iTableBottom = FixedHeader.oDoc.iHeight - m.iTableTop - m.iTableHeight;
    },

    /*
     * Function: _fnSumScroll
     * Purpose:  Sum node parameters all the way to the top
     * Returns:  int: sum
     * Inputs:   node:n - node to consider
     *           string:side - scrollTop or scrollLeft
     */
    _fnSumScroll: function ( n, side )
    {
        var i = n[side];
        while ( n = n.parentNode )
        {
            if ( n.nodeName == 'HTML' || n.nodeName == 'BODY' )
            {
                break;
            }
            i = n[side];
        }
        return i;
    },

    /*
     * Function: _fnUpdatePositions
     * Purpose:  Loop over the fixed elements for this table and update their positions
     * Returns:  -
     * Inputs:   -
     */
    _fnUpdatePositions: function ()
    {
        var s = this.fnGetSettings();
        this._fnMeasure();

        for ( var i=0, iLen=s.aoCache.length ; i<iLen ; i++ )
        {
            if ( s.aoCache[i].sType == "fixedHeader" )
            {
                this._fnScrollFixedHeader( s.aoCache[i] );
            }
            else if ( s.aoCache[i].sType == "fixedFooter" )
            {
                this._fnScrollFixedFooter( s.aoCache[i] );
            }
            else if ( s.aoCache[i].sType == "fixedLeft" )
            {
                this._fnScrollHorizontalLeft( s.aoCache[i] );
            }
            else
            {
                this._fnScrollHorizontalRight( s.aoCache[i] );
            }
        }
    },

    /*
     * Function: _fnUpdateClones
     * Purpose:  Loop over the fixed elements for this table and call their cloning functions
     * Returns:  -
     * Inputs:   -
     */
    _fnUpdateClones: function ( full )
    {
        var s = this.fnGetSettings();

        if ( full ) {
            // This is a little bit of a hack to force a full clone draw. When
            // `full` is set to true, we want to reclone the source elements,
            // regardless of the clone-on-draw settings
            s.bInitComplete = false;
        }

        for ( var i=0, iLen=s.aoCache.length ; i<iLen ; i++ )
        {
            s.aoCache[i].fnClone.call( this, s.aoCache[i] );
        }

        if ( full ) {
            s.bInitComplete = true;
        }
    },


    /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
     * Scrolling functions
     */

    /*
     * Function: _fnScrollHorizontalLeft
     * Purpose:  Update the positioning of the scrolling elements
     * Returns:  -
     * Inputs:   object:oCache - the cached values for this fixed element
     */
    _fnScrollHorizontalRight: function ( oCache )
    {
        var
            s = this.fnGetSettings(),
            oMes = s.oMes,
            oWin = FixedHeader.oWin,
            oDoc = FixedHeader.oDoc,
            nTable = oCache.nWrapper,
            iFixedWidth = $(nTable).outerWidth();

        if ( oWin.iScrollRight < oMes.iTableRight )
        {
            /* Fully right aligned */
            this._fnUpdateCache( oCache, 'sPosition', 'absolute', 'position', nTable.style );
            this._fnUpdateCache( oCache, 'sTop', oMes.iTableTop+"px", 'top', nTable.style );
            this._fnUpdateCache( oCache, 'sLeft', (oMes.iTableLeft+oMes.iTableWidth-iFixedWidth)+"px", 'left', nTable.style );
        }
        else if ( oMes.iTableLeft < oDoc.iWidth-oWin.iScrollRight-iFixedWidth )
        {
            /* Middle */
            this._fnUpdateCache( oCache, 'sPosition', 'fixed', 'position', nTable.style );
            this._fnUpdateCache( oCache, 'sTop', (oMes.iTableTop-oWin.iScrollTop)+"px", 'top', nTable.style );
            this._fnUpdateCache( oCache, 'sLeft', (oWin.iWidth-iFixedWidth)+"px", 'left', nTable.style );
        }
        else
        {
            /* Fully left aligned */
            this._fnUpdateCache( oCache, 'sPosition', 'absolute', 'position', nTable.style );
            this._fnUpdateCache( oCache, 'sTop', oMes.iTableTop+"px", 'top', nTable.style );
            this._fnUpdateCache( oCache, 'sLeft', oMes.iTableLeft+"px", 'left', nTable.style );
        }
    },

    /*
     * Function: _fnScrollHorizontalLeft
     * Purpose:  Update the positioning of the scrolling elements
     * Returns:  -
     * Inputs:   object:oCache - the cached values for this fixed element
     */
    _fnScrollHorizontalLeft: function ( oCache )
    {
        var
            s = this.fnGetSettings(),
            oMes = s.oMes,
            oWin = FixedHeader.oWin,
            oDoc = FixedHeader.oDoc,
            nTable = oCache.nWrapper,
            iCellWidth = $(nTable).outerWidth();

        if ( oWin.iScrollLeft < oMes.iTableLeft )
        {
            /* Fully left align */
            this._fnUpdateCache( oCache, 'sPosition', 'absolute', 'position', nTable.style );
            this._fnUpdateCache( oCache, 'sTop', oMes.iTableTop+"px", 'top', nTable.style );
            this._fnUpdateCache( oCache, 'sLeft', oMes.iTableLeft+"px", 'left', nTable.style );
        }
        else if ( oWin.iScrollLeft < oMes.iTableLeft+oMes.iTableWidth-iCellWidth )
        {
            this._fnUpdateCache( oCache, 'sPosition', 'fixed', 'position', nTable.style );
            this._fnUpdateCache( oCache, 'sTop', (oMes.iTableTop-oWin.iScrollTop)+"px", 'top', nTable.style );
            this._fnUpdateCache( oCache, 'sLeft', "0px", 'left', nTable.style );
        }
        else
        {
            /* Fully right align */
            this._fnUpdateCache( oCache, 'sPosition', 'absolute', 'position', nTable.style );
            this._fnUpdateCache( oCache, 'sTop', oMes.iTableTop+"px", 'top', nTable.style );
            this._fnUpdateCache( oCache, 'sLeft', (oMes.iTableLeft+oMes.iTableWidth-iCellWidth)+"px", 'left', nTable.style );
        }
    },

    /*
     * Function: _fnScrollFixedFooter
     * Purpose:  Update the positioning of the scrolling elements
     * Returns:  -
     * Inputs:   object:oCache - the cached values for this fixed element
     */
    _fnScrollFixedFooter: function ( oCache )
    {
        var
            s = this.fnGetSettings(),
            oMes = s.oMes,
            oWin = FixedHeader.oWin,
            oDoc = FixedHeader.oDoc,
            nTable = oCache.nWrapper,
            iTheadHeight = $("thead", s.nTable).outerHeight(),
            iCellHeight = $(nTable).outerHeight();

        if ( oWin.iScrollBottom < oMes.iTableBottom )
        {
            /* Below */
            this._fnUpdateCache( oCache, 'sPosition', 'absolute', 'position', nTable.style );
            this._fnUpdateCache( oCache, 'sTop', (oMes.iTableTop+oMes.iTableHeight-iCellHeight)+"px", 'top', nTable.style );
            this._fnUpdateCache( oCache, 'sLeft', oMes.iTableLeft+"px", 'left', nTable.style );
        }
        else if ( oWin.iScrollBottom < oMes.iTableBottom+oMes.iTableHeight-iCellHeight-iTheadHeight )
        {
            this._fnUpdateCache( oCache, 'sPosition', 'fixed', 'position', nTable.style );
            this._fnUpdateCache( oCache, 'sTop', (oWin.iHeight-iCellHeight)+"px", 'top', nTable.style );
            this._fnUpdateCache( oCache, 'sLeft', (oMes.iTableLeft-oWin.iScrollLeft)+"px", 'left', nTable.style );
        }
        else
        {
            /* Above */
            this._fnUpdateCache( oCache, 'sPosition', 'absolute', 'position', nTable.style );
            this._fnUpdateCache( oCache, 'sTop', (oMes.iTableTop+iCellHeight)+"px", 'top', nTable.style );
            this._fnUpdateCache( oCache, 'sLeft', oMes.iTableLeft+"px", 'left', nTable.style );
        }
    },

    /*
     * Function: _fnScrollFixedHeader
     * Purpose:  Update the positioning of the scrolling elements
     * Returns:  -
     * Inputs:   object:oCache - the cached values for this fixed element
     */
    _fnScrollFixedHeader: function ( oCache )
    {
        var
            s = this.fnGetSettings(),
            oMes = s.oMes,
            oWin = FixedHeader.oWin,
            oDoc = FixedHeader.oDoc,
            nTable = oCache.nWrapper,
            iTbodyHeight = 0,
            anTbodies = s.nTable.getElementsByTagName('tbody');

        for (var i = 0; i < anTbodies.length; ++i) {
            iTbodyHeight += anTbodies[i].offsetHeight;
        }

        if ( oMes.iTableTop > oWin.iScrollTop + s.oOffset.top )
        {
            /* Above the table */
            this._fnUpdateCache( oCache, 'sPosition', "absolute", 'position', nTable.style );
            this._fnUpdateCache( oCache, 'sTop', oMes.iTableTop+"px", 'top', nTable.style );
            this._fnUpdateCache( oCache, 'sLeft', oMes.iTableLeft+"px", 'left', nTable.style );
        }
        else if ( oWin.iScrollTop + s.oOffset.top > oMes.iTableTop+iTbodyHeight )
        {
            /* At the bottom of the table */
            this._fnUpdateCache( oCache, 'sPosition', "absolute", 'position', nTable.style );
            this._fnUpdateCache( oCache, 'sTop', (oMes.iTableTop+iTbodyHeight)+"px", 'top', nTable.style );
            this._fnUpdateCache( oCache, 'sLeft', oMes.iTableLeft+"px", 'left', nTable.style );
        }
        else
        {
            /* In the middle of the table */
            this._fnUpdateCache( oCache, 'sPosition', 'fixed', 'position', nTable.style );
            this._fnUpdateCache( oCache, 'sTop', s.oOffset.top+"px", 'top', nTable.style );
            this._fnUpdateCache( oCache, 'sLeft', (oMes.iTableLeft-oWin.iScrollLeft)+"px", 'left', nTable.style );
        }
    },

    /*
     * Function: _fnUpdateCache
     * Purpose:  Check the cache and update cache and value if needed
     * Returns:  -
     * Inputs:   object:oCache - local cache object
     *           string:sCache - cache property
     *           string:sSet - value to set
     *           string:sProperty - object property to set
     *           object:oObj - object to update
     */
    _fnUpdateCache: function ( oCache, sCache, sSet, sProperty, oObj )
    {
        if ( oCache[sCache] != sSet )
        {
            oObj[sProperty] = sSet;
            oCache[sCache] = sSet;
        }
    },



    /**
     * Copy the classes of all child nodes from one element to another. This implies
     * that the two have identical structure - no error checking is performed to that
     * fact.
     *  @param {element} source Node to copy classes from
     *  @param {element} dest Node to copy classes too
     */
    _fnClassUpdate: function ( source, dest )
    {
        var that = this;

        if ( source.nodeName.toUpperCase() === "TR" || source.nodeName.toUpperCase() === "TH" ||
             source.nodeName.toUpperCase() === "TD" || source.nodeName.toUpperCase() === "SPAN" )
        {
            dest.className = source.className;
        }

        $(source).children().each( function (i) {
            that._fnClassUpdate( $(source).children()[i], $(dest).children()[i] );
        } );
    },


    /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
     * Cloning functions
     */

    /*
     * Function: _fnCloneThead
     * Purpose:  Clone the thead element
     * Returns:  -
     * Inputs:   object:oCache - the cached values for this fixed element
     */
    _fnCloneThead: function ( oCache )
    {
        var s = this.fnGetSettings();
        var nTable = oCache.nNode;

        if ( s.bInitComplete && !s.oCloneOnDraw.top )
        {
            this._fnClassUpdate( $('thead', s.nTable)[0], $('thead', nTable)[0] );
            return;
        }

        /* Set the wrapper width to match that of the cloned table */
        var iDtWidth = $(s.nTable).outerWidth();
        oCache.nWrapper.style.width = iDtWidth+"px";
        nTable.style.width = iDtWidth+"px";

        /* Remove any children the cloned table has */
        while ( nTable.childNodes.length > 0 )
        {
            $('thead th', nTable).unbind( 'click' );
            nTable.removeChild( nTable.childNodes[0] );
        }

        /* Clone the DataTables header */
        var nThead = $('thead', s.nTable).clone(true)[0];
        nTable.appendChild( nThead );

        /* Copy the widths across - apparently a clone isn't good enough for this */
        var a = [];
        var b = [];

        $("thead>tr th", s.nTable).each( function (i) {
            a.push( $(this).width() );
        } );

        $("thead>tr td", s.nTable).each( function (i) {
            b.push( $(this).width() );
        } );

        $("thead>tr th", s.nTable).each( function (i) {
            $("thead>tr th:eq("+i+")", nTable).width( a[i] );
            $(this).width( a[i] );
        } );

        $("thead>tr td", s.nTable).each( function (i) {
            $("thead>tr td:eq("+i+")", nTable).width( b[i] );
            $(this).width( b[i] );
        } );

        // Stop DataTables 1.9 from putting a focus ring on the headers when
        // clicked to sort
        $('th.sorting, th.sorting_desc, th.sorting_asc', nTable).bind( 'click', function () {
            this.blur();
        } );
    },

    /*
     * Function: _fnCloneTfoot
     * Purpose:  Clone the tfoot element
     * Returns:  -
     * Inputs:   object:oCache - the cached values for this fixed element
     */
    _fnCloneTfoot: function ( oCache )
    {
        var s = this.fnGetSettings();
        var nTable = oCache.nNode;

        /* Set the wrapper width to match that of the cloned table */
        oCache.nWrapper.style.width = $(s.nTable).outerWidth()+"px";

        /* Remove any children the cloned table has */
        while ( nTable.childNodes.length > 0 )
        {
            nTable.removeChild( nTable.childNodes[0] );
        }

        /* Clone the DataTables footer */
        var nTfoot = $('tfoot', s.nTable).clone(true)[0];
        nTable.appendChild( nTfoot );

        /* Copy the widths across - apparently a clone isn't good enough for this */
        $("tfoot:eq(0)>tr th", s.nTable).each( function (i) {
            $("tfoot:eq(0)>tr th:eq("+i+")", nTable).width( $(this).width() );
        } );

        $("tfoot:eq(0)>tr td", s.nTable).each( function (i) {
            $("tfoot:eq(0)>tr td:eq("+i+")", nTable).width( $(this).width() );
        } );
    },

    /*
     * Function: _fnCloneTLeft
     * Purpose:  Clone the left column(s)
     * Returns:  -
     * Inputs:   object:oCache - the cached values for this fixed element
     */
    _fnCloneTLeft: function ( oCache )
    {
        var s = this.fnGetSettings();
        var nTable = oCache.nNode;
        var nBody = $('tbody', s.nTable)[0];

        /* Remove any children the cloned table has */
        while ( nTable.childNodes.length > 0 )
        {
            nTable.removeChild( nTable.childNodes[0] );
        }

        /* Is this the most efficient way to do this - it looks horrible... */
        nTable.appendChild( $("thead", s.nTable).clone(true)[0] );
        nTable.appendChild( $("tbody", s.nTable).clone(true)[0] );
        if ( s.bFooter )
        {
            nTable.appendChild( $("tfoot", s.nTable).clone(true)[0] );
        }

        /* Remove unneeded cells */
        var sSelector = 'gt(' + (oCache.iCells - 1) + ')';
        $('thead tr', nTable).each( function (k) {
            $('th:' + sSelector, this).remove();
        } );

        $('tfoot tr', nTable).each( function (k) {
            $('th:' + sSelector, this).remove();
        } );

        $('tbody tr', nTable).each( function (k) {
            $('td:' + sSelector, this).remove();
        } );

        this.fnEqualiseHeights( 'thead', nBody.parentNode, nTable );
        this.fnEqualiseHeights( 'tbody', nBody.parentNode, nTable );
        this.fnEqualiseHeights( 'tfoot', nBody.parentNode, nTable );

        var iWidth = 0;
        for (var i = 0; i < oCache.iCells; i++) {
            iWidth += $('thead tr th:eq(' + i + ')', s.nTable).outerWidth();
        }
        nTable.style.width = iWidth+"px";
        oCache.nWrapper.style.width = iWidth+"px";
    },

    /*
     * Function: _fnCloneTRight
     * Purpose:  Clone the right most column(s)
     * Returns:  -
     * Inputs:   object:oCache - the cached values for this fixed element
     */
    _fnCloneTRight: function ( oCache )
    {
        var s = this.fnGetSettings();
        var nBody = $('tbody', s.nTable)[0];
        var nTable = oCache.nNode;
        var iCols = $('tbody tr:eq(0) td', s.nTable).length;

        /* Remove any children the cloned table has */
        while ( nTable.childNodes.length > 0 )
        {
            nTable.removeChild( nTable.childNodes[0] );
        }

        /* Is this the most efficient way to do this - it looks horrible... */
        nTable.appendChild( $("thead", s.nTable).clone(true)[0] );
        nTable.appendChild( $("tbody", s.nTable).clone(true)[0] );
        if ( s.bFooter )
        {
            nTable.appendChild( $("tfoot", s.nTable).clone(true)[0] );
        }
        $('thead tr th:lt('+(iCols-oCache.iCells)+')', nTable).remove();
        $('tfoot tr th:lt('+(iCols-oCache.iCells)+')', nTable).remove();

        /* Remove unneeded cells */
        $('tbody tr', nTable).each( function (k) {
            $('td:lt('+(iCols-oCache.iCells)+')', this).remove();
        } );

        this.fnEqualiseHeights( 'thead', nBody.parentNode, nTable );
        this.fnEqualiseHeights( 'tbody', nBody.parentNode, nTable );
        this.fnEqualiseHeights( 'tfoot', nBody.parentNode, nTable );

        var iWidth = 0;
        for (var i = 0; i < oCache.iCells; i++) {
            iWidth += $('thead tr th:eq('+(iCols-1-i)+')', s.nTable).outerWidth();
        }
        nTable.style.width = iWidth+"px";
        oCache.nWrapper.style.width = iWidth+"px";
    },


    /**
     * Equalise the heights of the rows in a given table node in a cross browser way. Note that this
     * is more or less lifted as is from FixedColumns
     *  @method  fnEqualiseHeights
     *  @returns void
     *  @param   {string} parent Node type - thead, tbody or tfoot
     *  @param   {element} original Original node to take the heights from
     *  @param   {element} clone Copy the heights to
     *  @private
     */
    "fnEqualiseHeights": function ( parent, original, clone )
    {
        var that = this;
        var originals = $(parent +' tr', original);
        var height;

        $(parent+' tr', clone).each( function (k) {
            height = originals.eq( k ).css('height');

            // This is nasty :-(. IE has a sub-pixel error even when setting
            // the height below (the Firefox fix) which causes the fixed column
            // to go out of alignment. Need to add a pixel before the assignment
            // Can this be feature detected? Not sure how...
            if ( navigator.appName == 'Microsoft Internet Explorer' ) {
                height = parseInt( height, 10 ) + 1;
            }

            $(this).css( 'height', height );

            // For Firefox to work, we need to also set the height of the
            // original row, to the value that we read from it! Otherwise there
            // is a sub-pixel rounding error
            originals.eq( k ).css( 'height', height );
        } );
    }
};


/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * Static properties and methods
 *   We use these for speed! This information is common to all instances of FixedHeader, so no
 * point if having them calculated and stored for each different instance.
 */

/*
 * Variable: oWin
 * Purpose:  Store information about the window positioning
 * Scope:    FixedHeader
 */
FixedHeader.oWin = {
    "iScrollTop": 0,
    "iScrollRight": 0,
    "iScrollBottom": 0,
    "iScrollLeft": 0,
    "iHeight": 0,
    "iWidth": 0
};

/*
 * Variable: oDoc
 * Purpose:  Store information about the document size
 * Scope:    FixedHeader
 */
FixedHeader.oDoc = {
    "iHeight": 0,
    "iWidth": 0
};

/*
 * Variable: afnScroll
 * Purpose:  Array of functions that are to be used for the scrolling components
 * Scope:    FixedHeader
 */
FixedHeader.afnScroll = [];

/*
 * Function: fnMeasure
 * Purpose:  Update the measurements for the window and document
 * Returns:  -
 * Inputs:   -
 */
FixedHeader.fnMeasure = function ()
{
    var
        jqWin = $(window),
        jqDoc = $(document),
        oWin = FixedHeader.oWin,
        oDoc = FixedHeader.oDoc;

    oDoc.iHeight = jqDoc.height();
    oDoc.iWidth = jqDoc.width();

    oWin.iHeight = jqWin.height();
    oWin.iWidth = jqWin.width();
    oWin.iScrollTop = jqWin.scrollTop();
    oWin.iScrollLeft = jqWin.scrollLeft();
    oWin.iScrollRight = oDoc.iWidth - oWin.iScrollLeft - oWin.iWidth;
    oWin.iScrollBottom = oDoc.iHeight - oWin.iScrollTop - oWin.iHeight;
};


FixedHeader.version = "2.1.2";


/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * Global processing
 */

/*
 * Just one 'scroll' event handler in FixedHeader, which calls the required components. This is
 * done as an optimisation, to reduce calculation and proagation time
 */
$(window).scroll( function () {
    FixedHeader.fnMeasure();

    for ( var i=0, iLen=FixedHeader.afnScroll.length ; i<iLen ; i++ ) {
        FixedHeader.afnScroll[i]();
    }
} );


$.fn.dataTable.FixedHeader = FixedHeader;
$.fn.DataTable.FixedHeader = FixedHeader;


return FixedHeader;
}; // /factory


/*// Define as an AMD module if possible
if ( typeof define === 'function' && define.amd ) {
    define( ['jquery', 'datatables'], factory );
}
else if ( typeof exports === 'object' ) {
    // Node/CommonJS
    factory( require('jquery'), require('datatables') );
}
else if ( jQuery && !jQuery.fn.dataTable.FixedHeader ) {
    // Otherwise simply initialise as normal, stopping multiple evaluation
    factory( jQuery, jQuery.fn.dataTable );
}*/

if ( jQuery && !jQuery.fn.dataTable.FixedHeader ) {
    // Otherwise simply initialise as normal, stopping multiple evaluation
    factory( jQuery, jQuery.fn.dataTable );
}

})(window, document);






//end
});
